Machine



J. .P. was. I NEEDLE FOR CHAIN STITCH SEWING MACHHQES.

; APPLICATION man SEPT. 11. 1918. 1,323,340;

' Patented Dec. 2,1919.

IN VEN TOR.

UNITED STATES PATENT oF noE.

JOHN P. were, or NYACK, NEW YORK, ASSIGNOR TOMETROPOLITAN sr wmc MACHINECORPORATION, A CORPORATION or DELAWARE- NEEDLE FOR CHAIN-STITCHSEWING-MACHINES.-

To all whom it may concern; Be it known that I, JOHN P. WEIS, a c1t1 zenof the United States, residing at Nyack, in the county of Rockland andState of New York, have invented certain newand useful Improvements inNeedles for Chaintrally or axially of the needle, as is usual,

and having as another feature thereof a pair of spirally formed grooves,the obJect of the invention being to provide an improved needleparticularly adapted for use with a two-thread chain stitch sewingmachine, the needle being sofconstructed that it may be threaded atright angles to the line of feed and by means of which the necessity ofproviding loopers having a laterally vibrating movement is eliminatedwhile at the same time delicate threads can be handled with greaterfacility and the sewing conditions greatly improved since. the groovesare shaped to accommodate the natural run of the thread during thestitchQ ing operation.

The off-set point permits the needle to so co-act with the loopers thatnot only is the skipping of stitches prevented but the use of loopershaving a lateral vibrating movement is entirely eliminated; that is tosay, by the use of this improved needle the wellknown two-thread chainstitch sewing machines perform their functions without the necessity oftheloopers having the usual socalled needle avoiding movements.Consequently many of the parts heretofore necessary in two-thread chainstitch sewing machines can be dispensed wlth, resulting in economy ofparts, easier malntenance and greater simplicity, obviatingnoise,friction, etc.

I am aware that various shapes of needle points have. been provided fordifferent characters of work and that grooves of various lengths andshapes have been used, but so far as I know I am the first to provide anoff-set point needle with one or morespiral rooves and which enables theformation 0 double chain stitching without the Specification of LettersPatent.

IIhe needle blade terminates in a Patented Dec. 2, 1919.

Application filed September 11, 1918. Serial No. 253,535.

necessity of having loopers operating from one side to the other of theneedle, and also without the use ofspreaders for spreading the looperloop. Another important advantage of this improved off-set point needleis that the deflection of the needle when penetrating the goods isalways in the one direction, 2'. 0., toward the looper, and this alsoobviates the use of a needle guide.

In the accompanying application of A. H.

Weis, Serial No. 255,666, filed September 25, 1918, for improvements insewing machine looper mechanism this improved needle is shown inconnection with an improved looper forthe making of double thread chainstitches.

In the drawings accompanying and forming, a part of this specification,Figure l is a front elevation of this improved needle provided with atwist groove and a lefthand off-set point; Fig. 2- is a view similar toFig. 1 showing the needle made with a right-hand ofl;set point; Fig. .3.is a sectional view of the needle splitting the eye thereof; and Fig.4:. is a View showing the left-hand side of the needle illustrated inFi 1. Similar characters of reference indicate corresponding parts inthe several figures of the drawings.

This improved needle comp-rises a shank l, terminating in a blade 2,which is grooved as at 3 to receive one strand of the needle thread.This groove isspirally formed as at 4 so as to extend from the front toone side as at 5 where'it merges into the eye 6.

The opposite side of the needle adjacent to this eye is also grooved asat 7 for a certain distance and is also provided with a notch 8 and agroove 9, which extends from the top of the notch to the rear orthatside of the needle opposite the groove 3. The straight groove 7 is shownintersecting or crossing the eye of the needle and leads to the notch 8,which notchis for the purpose of permits ting the looper point to passbetween the needle and the thread to catch the needle loop and alsoprevents the thread from being pinched oil as the needle enters the.work.

point 10" ll of the needle, and this point 10 lies in the j same'planewith one of the Walls of the needle blade, v This point with respect tothe center line or vertical axis of the needle blade may be located atany radial position relatively to the axis of the needle so as toproject toward any pbint of a circle around the needle blade so as toproperly cooperate with the looper. 'In the present instance I haveshown a right-hand and. a left-hand offset point, but in actual practicethese points may be considered as front and rear off-set pointsdepending upon the character of machine in which the needles are to beused. For instance, in the needle shown in Fig. 2, when used with alooper operating at right angles to the line of feed as shown anddescribed in the said application of A. H.

WVeis, the point and notch of the needles would be the rear side and inthat instance I would. prefer to use a straight grooved needle,becausein that type of machine the action of the needle thread is from front torear in the direction of the line of feed. In machines having theloopers operate parallel to the line of feed, I prefer to use the twistgrooved needle because the thread enters from the front twists around tothe side, either to the right or left, at right angles to the front ofthe needle to the opposite side thereof where the looper cooperates withthe notch of the needle in the formation of the stitches, the threadextending through the needle eye and in loop form around the looper whenthe needle is up and when the needle is down the thread extends from thefront twist groove through the eye at the side up the opposite side ofthe needle in the twist groove to the back of the needle through thepreviously made stitch. I have found by the use of the twist groovedelicate threads can be handled with greater facility and the sewingconditions are greatly improved by reason of the groove being shaped toacommodate the natural run of the thread during the stitching operation.

It will be observed that the eye of the needle extends in the samedirection as the offset point and not transversely" to the direction inwhich said point is offset, so that the needle is threaded at rightangles to the line of feed.

The disadvantages present in the use of a straight grooved needle havinga notch are entirely overcome by the present improved needle. In astraight grooved needle having a notch the thread falls into the notch;in other words. the thread makes a quarter twist from the straightgroove around the needle and drops into the notch and causes skippingand breaking of the thread for in making the twist around the needlefrom the straight groove to the notch it necessarily crosses one of thesharp edges of the groove and this interferes with the drawing up of atight stitch and frequently causes the breaking of a thread. Byproviding how ever, the twist or spiral groove, the twist forms anatural path to accommodate the run of the thread to the notch and byreason of the fact that the bottom of the needle is also grooved as at7, and as this groove leads directly to the notch 8, it follows that therun of the thread extending from the needle eye bridges overthe notch tothe groove 9 whereby it is steadied at the time the looper is co-actingwith the needle, and as the point of the needle is offset in the mannerhereinbefore stated, this enables the needle to co-act with a looperoperating in a single plane to properly get behind the looper thread. Ifit were not for the notch the thread would lie directly against the bodyof the needle and the slightest deflection of the needle would cause theskipping of stitches'so that the point of the looperwould soon be wornaway.

I claim as my invention:

1. An eye-po1nted sewing machine needle having an ofi'set point, a notchabove the eye, a spiral groove leading upwardly from the notch, and astraight groove intersecting the eye and leading to the notch.

2, An eye pointed sewing machine needle having-an off-set point and aspiralgroove merging into the eye.

3. An eye pointed sewing machine needle having an off-set point, aspiral groove 95 merging into the eye, and a groove extending to thatside of the needleopposite to that of the spiral groove. e

4:. An eye pointed sewing machine needle having an offset point, aspiral groove merging into the eye, a groove extending to that side ofthe needle opposite to that of the spiral groove, and a notch from thetop of which said last groove extends.

5. An eye pointed sewing machine needle 105 having an off-set point, anotch at its front side, a groove extending from the top of the notchto, one side of the needle, and a spirally formed groove extending fromthe front side of the needle to the side thereof opposite that to whichsaid first groove extends and merging into the eye of the needle.

6. An eye pointed needle for sewing machines having a point ofl"-setfrom the center line or vertical axis of the needle and provided withone or more spiral grooves, one terminating in the eye of the needle.

7 An eye pointed needle for sewing machines having a point off-Set fromthe center line or vertical axis of the needle and provided with aplurality of spirally formed grooves.

8. An eye pointed needle for sewing machines having a point off-set fromthecenter line or vertical axis of the needle and provided with aplurality of spirally formed grooves," one terminating in the eye of theneedle.

9. An eye pointed needle for sewing machines having a point off-set fromthe center line or vertical axis of the needle and provided with aplurality of spirally formed grooves, one terminating in the eyev of theneedle and located at opposite sides of the needle.

10. An eye pointed needle for sewing machines having a point ofi-setfrom the center line or vertical axis of the needle and pro.- vided witha plurality of spirally formed grooves, one terminating in the eye ofthe needle and located at opposite sides of the needle and the otherterminating in a notch located at the front of the needle.

11. An eye pointed needle for sewing machines having a point off-setfrom the center line or vertical axis of the needle and provided with aplurality of spirally formed grooves, one terminating in the eye of theneedle and located at opposite sides of the needle and the otherterminating in a notch located at the front of the needle, said notchmerging into a third groove adjacent to the eye and at the front of theneedle.

12. An eye pointed needle for chain stitch sewing machines comprising ashank and blade, the latter having a pomt off-set from the center lineor vertical axis of the needle and provided with a plurality of spirallyformed grooves, one terminating in the eye of the needle and located atopposite sides of the needle and the other terminating in a notchlocated at the front of the needle, said notch merging into a thirdgroove adjacent to the eye and at the front of the needle.

' 13. An eye pointed sewing machine needle having an ofl-set point, aspiral groove', and a notch adjacent to said eye. lt. An eye pointedsewing machine needle havlng an offset point, a pair of spiral grooves,one merging into said eye, and a notch adjacent to said eye.

An eye pointed sewing machine needle having a pair of spirally formedgrooves.

16. An eye pointed sewing machine needle having a pair of spirallyformed grooves, one only merging into the eye.

17. An eye pointed sewing machine needle having an oifset point, one ormore spiral grooves, the eye of the needle extending in the samedirection as the offset point.

18. An eye pointed sewing machine needle having an offset point and aspiral groove.

19. An eye-pointed sewing machine needle 7 having an offset point, anotch above the eye,

a spiral groove leading upwardly from the notch, a straight grooveintersecting the eye and leading to the notch, and another spiral grooveleading upwardly from the eye, both of said grooves having a longgradual spiral formation.

Signed at Nyack, county of Rockland and State of New York, this 5th dayof Sept. 1918.

JOHN P. WEIS.

